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Store SKU #600366

1 Gal. Asphalt Flashing Cement Roofing Adhesive

  • Asphalt-based formulation makes roof surfaces leakproof
  • Ideal for repairing shingles, concrete, wall flashings, and more
  • Seals cracks on vertical and horizontal surfaces without any sags
  • See More Details

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Product Overview

This 1 Gal. Asphalt Flashing Cement creates a durable, elastic coating with excellent adhesion and a high degree of resistance to water and weathering. This cement contains selected asphalts, mineral fibers and refined solvents and provides reliable durability when used in a wide range of temperatures and weather conditions. Adheres to vertical and horizontal surfaces without sagging.
  • Contains selected asphalts, mineral fibers and refined solvents
  • Suitable for use over a wide range of temperatures and weather conditions
  • Provides a durable, elastic coating with excellent adhesion and a high degree of resistance to water and weathering
  • Dries to a tough, flexible, corrosion-proof coating
  • Suitable for general use in the maintenance of exposed buildings and structures
  • Use to repair leaks in shingles, concrete, metal roofs, asphalt roofs, wall flashings, chimneys, flues, skylights, downspouts and cornices
  • Seals roof cracks and splits
  • Suitable for use as a joint filler for precast roof slabs
  • Heavy consistency for application by trowel
  • California residents

Info & Guides

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Price
Ratings
(75)
(271)
(1361)
(0)
Application MethodTrowelTrowelCaulk Gun/Dispenser,TrowelTrowel
FeaturesWater ResistantAlgae Resistant,Corrosion Resistant,Extreme Cold & Ice,Extreme Heat,Mildew Resistant,Rust Resistant,Water Resistant,WaterproofAlgae Resistant,Corrosion Resistant,Extreme Cold & Ice,Extreme Heat,High Impact/Hail Resistant,High Wind Resistant,Impact Resistant,Mildew Resistant,Paintable,Rust Resistant,Water Resistant,WaterproofWater Resistant,Waterproof
Roof Repair TypeFlashing CementSBSRoof SealantAcrylic
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Specifications

Dimensions

Container Size
1 Gallon
Product Depth (in.)
6.6
Product Height (in.)
7.5
Product Size (oz.)
128
Product Width (in.)
6.6

Details

Application Method
Trowel
Coating Base
Asphalt
Cold Applied
Cold Applied
Color Family
Black
Color/Finish
Black
Features
Water Resistant
Returnable
90-Day
Roof Repair Type
Flashing Cement
Roofing Product Type
Roofing Repair

Warranty / Certifications

Manufacturer Warranty
3-Year Limited Material

Questions & Answers

10Questions11Answers

Just finished watching a u tube video saying this can be used under water on flat roofs that the ...

Asked by pap January 24, 2021
1
Answer

If you need to make repairs on a wet asphalt based roof you will need 19 Ultra Rubberized Flashing Cement. 19 Ultra is for both Wet and Dry roof surfaces. The product you referenced is 19 Flashing Cement which is for Dry surfaces only hence no mention of applying to wet roofs.

Can this be used to fill cracks on asphalt driveway?

Asked by Bonsai4 September 22, 2020
2
Answers

Yes or no

can this be used as cement to attach asphalt rolled roofing ?

Asked by minnehonk August 10, 2020
1
Answer

19 Flashing Cement maybe used to attached rolled roofing along the edge laps and end laps. In the field 16 Double Coverage Lap Cement should be used.

At what temperature range can I apply Karnak 19 Flashing Cement?

Asked by Alby October 4, 2019
1
Answer

The recommended application temperature range is 40 deg. F to 120 deg. F. 19 Flashing Cement is solvent-based and will not freeze so it may be applied below 40 deg. F as long a special precautions are taken that include keeping the product warm (between 50 deg. F & 90 deg. F) just prior to use and making sure the surface to which it will be applied over is free of any snow, frost or ice crystals.

Is this product paintable?

Asked by Jerry August 19, 2019
2
Answers

It's recommended to allow the flashing cement to cure a minimum of 60 days before coating over. Check with your paint manufacturer for instructions for coating over asphalt-based products. You will likely need to apply a stain blocking primer first prior to applying an acrylic or latex based paint. You may coat directly over the flashing cement with an asphalt-based aluminum roof coating after allowing 60 days curing.

Can Karnak 19 ultra be used to plug up holes in basement stone wall leaks?

Asked by Denise June 30, 2019
1
Answer

Holes in basement stone walls should be filled with a masonry cement type repair product. Cracks in stone or masonry walls may be sealed using 19 Ultra and fabric reinforcement on the exterior side of the wall. 19 Ultra is for exterior use only.

Can this be used on a flat rubber roof?

Asked by Alex January 31, 2019
1
Answer

If by "rubber roof" you are referring to an EPDM membrane roof, then no, asphalt-based products are not recommended for these types of roof membranes. For EPDM you may use 505MS Karna-Flex WB and 5540 Resat-Mat to make repairs. If the roof is a modified bitumen membrane roof, either smooth surface or granule, I would recommend 19 Ultra Rubberized Flashing Cement for making repairs.

CAN THIS BE THINNED OUT WITH MINERAL SPIRITS LIKE 112AF. I USED 112A THINNED OUT TO PAINT MY RAI...

Asked by RON September 14, 2017
1
Answer

No, this can not be thinned out with mineral spirits.

does this come in a white color

Asked by selfie May 9, 2016
1
Answer

Hi Selfie! This item is a store exclusive and is not available online. Please partner with your local store for any questions about availability, color and pricing. Please contact us at 1-800-430-3376 for further online assistance or to speak with our online customer service team.

i have , liquid nails roof repair, already, over the shingles, near flashing leak, can his be used over , this tar, or do i need to try, to remove t

Asked by ruthie December 16, 2015
0
Answers

1 Gal. Asphalt Flashing Cement Roofing Adhesive - page 2

Customer Reviews

  • 4.5
    out of 75 reviews
  • 93% recommend this product
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This product does exactly what it’s meant to do and...
This product does exactly what it’s meant to do and it holds up very well
by HomeDepotCustomer
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Works great! It is easy to apply. It dries fast....
Works great! It is easy to apply. It dries fast.
by Kc
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
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Response from KARNAK Technical GroupDec 8, 2020
Thank you for choosing KARNAK and for your rating KARNAK
Showing 1-10 of 75 reviews